Behind Ear Hearing Aid Interlocking Shell Plug Security
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Solution Overview
Problem
Hearing aids face challenges in reliable and easy operation due to difficulties in correctly placing the in-ear piece and securing the electrical and mechanical connection between the in-ear and behind-the-ear components, with leads needing to be exchangeable for individual fit and potential misplacement issues.
Innovation Solution
A behind-the-ear hearing aid design featuring interlocking shell elements that secure the lead connection, preventing accidental disconnection and ensuring the plug is trapped between the shell elements, with a u-shaped shell and a flat lid design that requires disconnection of both shell elements to release the plug, and a frictional or flexible latch for easy disconnection of the lid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple lead connection is used between in-ear and behind-the-ear parts, then ease of operation is improved, but reliability deteriorates due to accidental disconnection
Solution Approach 1:
The housing is divided into two separable shell elements that can be connected and disconnected. The plug connection is trapped between these shell elements when connected, providing security against accidental disconnection while allowing intentional access when needed.
Solution Approach 2:
The plug is nested or trapped between the two shell elements of the housing. This nesting arrangement secures the plug connection within the housing structure, preventing accidental disconnection while maintaining ease of operation through intentional shell separation.
2Adaptability or versatility
If exchangeable leads are provided for individual fit, then adaptability is improved, but device complexity worsens due to multiple connection components
Solution Approach 1:
The hearing aid is segmented into exchangeable components: the in-ear receiver and the behind-the-ear housing with lead. This allows users to exchange leads for different lengths and shapes to suit individual physiognomy while keeping the main housing structure simple and unified.
Solution Approach 2:
The standardized plug connection design allows the same housing structure to work with multiple different leads. The universal plug interface enables adaptability for individual user needs without requiring different housing designs for each lead variation.
3Reliability
If a locking mechanism is added to secure the plug connection, then reliability is improved, but device complexity worsens
Solution Approach 1:
The security function for the plug connection is merged into the housing structure itself. The two shell elements of the housing collectively provide the securing mechanism by trapping the plug between them, eliminating the need for a separate locking mechanism and reducing overall device complexity.
Solution Approach 2:
The plug is nested between the two shell elements, which act together as the securing structure. This nested arrangement provides reliable security against accidental disconnection without requiring additional locking components, as the housing structure itself performs the securing function.
4Ease of operation
If the plug is easily accessible for lead exchange, then ease of operation is improved, but reliability worsens due to increased risk of accidental disconnection
Solution Approach 1:
The housing is segmented into two shell elements that can be intentionally separated for plug access. This segmentation allows users to easily access the plug for lead exchange by simply disconnecting the shells, while the connected state provides security against accidental disconnection.
Solution Approach 2:
The housing transitions between two dynamic states: connected (providing security and preventing accidental disconnection) and disconnected (providing access for lead exchange). This dynamic design allows the same structure to serve both reliability and ease of operation needs depending on its state.
Data Source
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AI summary
A behind the ear hearing aid is provided with a casing part comprising electronics adapted for signal processing where the casing is adapted for placing behind the ear of a user and a speaker is provided in or near the ear canal and leads are arranged between the speaker and the casing part. A plug and socket electrical and mechanical interconnection is arranged between the leads and the electronics inside the casing and the mutual motion between the plug and socket parts for establishing connection is in a direction essentially off axis to the axis of the leads at the casing part.